1299798390 has 32 divisors (see below), whose sum is σ = 3403109376. Its totient is φ = 315102560.

The previous prime is 1299798389. The next prime is 1299798407. The reversal of 1299798390 is 938979921.

It is a self number, because there is not a number n which added to its sum of digits gives 1299798390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1969062 + ... + 1969721.

It is an arithmetic number, because the mean of its divisors is an integer number (106347168).

Almost surely, 2^1299798390 is an apocalyptic number.

1299798390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1299798390 is an abundant number, since it is smaller than the sum of its proper divisors (2103310986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299798390 is a wasteful number, since it uses less digits than its factorization.

1299798390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938804.

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 1299798390 is about 36052.7168185700. The cubic root of 1299798390 is about 1091.3364607291.

The spelling of 1299798390 in words is "one billion, two hundred ninety-nine million, seven hundred ninety-eight thousand, three hundred ninety".